Stephan Ewen created FLINK-4421:
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Summary: Make clocks and time measurements monotonous
Key: FLINK-4421
URL: https://issues.apache.org/jira/browse/FLINK-4421
Project: Flink
Issue Type: Improvement
Components: Core
Reporter: Stephan Ewen
Priority: Minor
Currently, many places use {{System.currentTimeMillis()}} to acquire timestamps
or measure time intervals.
Since this relies on the system clock, and the system clock is not necessarily
monotonous (in the presence of clock updates), this can lead to negative
duration and decreasing timestamps where increasing timestamps are expected.
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